The water temperature (11 °C) at Gunwalloe is fairly cold. Surfers will need a quality steamer wetsuit, a neoprene hood, gloves and boots because it will be cloudy with an effective air temperature of (7 °C).

Gunwalloe sea water temperatures peak in the range 15 to 18°C (59 to 64°F) on around the 8th of August and are at their lowest on about the 24th of February, in the range 8 to 10°C (46 to 50°F). The highest seasonal sea water temperatures at Gunwalloe in early to mid August lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots. At its lowest in the fourth week of February, low sea water temperatures at Gunwalloe are suited to a 5/4mm or 5/3mm good quality wetsuit with neoprene gloves and 3mm boots. You will need a hood if it's windy or the air is cold.